| 摘要 |
This optical amplification device is provided with: a conversion unit capable of converting polarization state; a first optical element, which has first and second incident ports, and which outputs, toward the conversion unit, a first laser beam inputted to the first incident port, said first laser beam being in a first polarization state, and a second laser beam inputted to the second incident port, said second laser beam being in a second polarization state; a second optical element, which is capable of outputting, as a laser beam in the second polarization state, the first laser beam the polarization state of which has been converted, and which is capable of outputting, toward an output unit to the outside, the second laser beam the polarization state of which has been converted; and an optical amplification unit, which amplifies the first laser beam outputted as the laser beam in the second polarization state by means of the second optical element, and which inputs, as the second laser beam, the amplified first laser beam to the second incident port of the first optical element. |
